0.000007 written in standard form is:
A7 x 10^-4
B7 x 10^-6
C7 x 10^-5
D7 x 10^-7
Answer & Solution
Correct answer: B. 7 x 10^-6
1. Count the places from the decimal point to the digit 7.
2. There are six of them, so the power of ten is negative six.
3. 0.000007 is 7 x 10^-6.
4. So the answer is 7 x 10^-6.
_Source: NCERT Class 8 Mathematics, Ch 10 'Exponents and Powers'_
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